perf kcore_copy: Keep a count of phdrs
In preparation to add more program headers, keep a count of phdrs. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org Link: http://lkml.kernel.org/r/1526986485-6562-12-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -1398,6 +1398,7 @@ struct kcore_copy_info {
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u64 last_symbol;
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u64 first_module;
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u64 last_module_symbol;
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size_t phnum;
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struct phdr_data kernel_map;
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struct phdr_data modules_map;
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struct list_head phdrs;
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@ -1517,6 +1518,8 @@ static int kcore_copy__read_maps(struct kcore_copy_info *kci, Elf *elf)
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if (kci->modules_map.len)
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list_add_tail(&kci->modules_map.node, &kci->phdrs);
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kci->phnum = !!kci->kernel_map.len + !!kci->modules_map.len;
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return 0;
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}
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@ -1678,7 +1681,6 @@ int kcore_copy(const char *from_dir, const char *to_dir)
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{
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struct kcore kcore;
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struct kcore extract;
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size_t count = 2;
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int idx = 0, err = -1;
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off_t offset = page_size, sz, modules_offset = 0;
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struct kcore_copy_info kci = { .stext = 0, };
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@ -1705,10 +1707,7 @@ int kcore_copy(const char *from_dir, const char *to_dir)
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if (kcore__init(&extract, extract_filename, kcore.elfclass, false))
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goto out_kcore_close;
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if (!kci.modules_map.addr)
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count -= 1;
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if (kcore__copy_hdr(&kcore, &extract, count))
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if (kcore__copy_hdr(&kcore, &extract, kci.phnum))
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goto out_extract_close;
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if (kcore__add_phdr(&extract, idx++, offset, kci.kernel_map.addr,
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